Quote:
Originally Posted by DrifterProdigy85
I run Tomei 270 Solid Cams on my 2871R .86 setup. There really not that bad. You can feel the difference when the turbo hits full boost to when you hit peak tq though. Hits around 20psi on the street below 4500rpm and tq feels the hardest around 5500rpm. Power feels like it comes on smoother than it used to with the 264 cams. Less wheel spin going from a 2nd gear roll but if you clutch kick, the tires spin like crazy. I should dyno this setup before i stick my GT3567R setup on. I raced a new M5 on the highway last weekend and I pulled around 6 car lengths from 60mph to 120mph. Guy was pretty surprised. My setup is pretty close to Brian W. except i have a P&P Head, Valve Job, and Ichiba Vers. II Exh. Mani.
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Im not a really big fan of the .86 on stock displacement for this reason.
Peak torque for a lot of t3/t4 cars Ive tuned comes on before this even with high duration cams (like 272).
But personally I feel the benefit of having a bottom mount with a T28 trim family wheel is to have it very fast spooling and torque building-style of power band.
I would wager that a properly tuned GT3071R with .63 housing will poop all over the .86 housing 2871R.
note exibit A
car made about 375 whp on a dynojet , but just note the point where the curve builds to peak torque.
and compare it to most .86 graphs, this is also a GT3076R which is even larger and mis-matched wheels on the CHRA